SAH-vuh muh-MON-toff
Here's a breakdown:
* SAH: The "a" sound is like the "a" in "father"
* vuh: The "v" sound is similar to the English "v"
* muh: The "u" sound is like the "u" in "but"
* MON: This is pronounced as a single syllable with the "o" sound like the "o" in "hot"
* toff: The "t" is a standard "t" sound, and the "off" is pronounced like the English word "off"
Remember, the stress is on the first syllable of "Savva" and the second syllable of "Mamontov".